Xavier Lorenzo/Getty Images(NEW YORK) -- The vaccine company Moderna on Thursday announced it submitted its request for the Food and Drug Administration to authorize its vaccine for children ages 6 months to 6 years, marking a hopeful development in the long journey for parents who are desperate to get their young kids vaccinated. "I think for these little children, they really represent an unmet medical need," Paul Burton, chief medical officer for Moderna, told ABC News. "I would be hopeful that the review will go on quickly and rigorously — but if it's approvable, this...